Last



May 15, 1928.

W. A. KRENTLER LAST Original Filed Nov 10, 1925 '2 Sheets-Sheet 1 May 15, 1928.

W. A. KRENTLER LAST Original Filed Nov. 10, 1926 2 Sheets-Sheet 2 Patented May 15, 1928 LAST,

Original application filedl'November 10, 1926, Serial Not 147,420. Divided-and i Februaryi26, 1927.

My, present invention. is an improved last,

7 and is a divisional of my prior andicopendingapplication, Sen No. 14:7 ,tQO, filed ov Anpimp'ortant feature lof ithepresent in-l t vention .is.t 0 provide ahinge, uniting two relatively movable members, which hinge m y b positively locked, topreizent movement of the two-membersconnected by the apositively locked hinge, which may he un-- locked without disturbing the relative locked Furtherobjects of the invention are to construct such a hinge "with a minimum number of pants, thus [simplifyingand econ-- omizingthje manufiacture ot-the hinges, and EU pair ng- V An important adaptation of my novel hinge is its utilization in lasts of the hinge 1 type, and-When used to perform.-theifunction of a last hinge, presents an improvement over the last structures illustrated in the prior Patentsnltos. 1,604,521 and 1,604,522, issued'oot. 26, 1926'. i 1

' In manufacturing hinge lasts it is; im-

portant to produce-a last Withg-reat strength,

and yet which will have a minimum number of parts, and also with as little weakening or cutting away of the wood o f the last as possible; To this end :an important feature 1 but three members, considering the. spring and .tube as one member.

her secured to the fore part of the last, a

second hinge member secured to the. heel part, and a combined spring hearing and holding, locking and unlocking member asunlocking member is movedfto unlocked po- I sition, the last parts Will still be held locked position, ready :for unlookingbr-col 7.

lapsing or shortening, with no further attention ibein paid to the locking and unlockingmerner, p Y I POsition of thefllinge members. v c

herein. I

plfisentrnovelhinge-that in niov-ingythe lockfacilitating operation, assembling and :res .o '37s posit-ion.

' of my .present constnuction consists in pro-H vidlng a, last hinge with four-parts, .or with These Vmembers comprise a spring, and a tubular hinge mem-;'

Serial no, 171, 31;

I A principal diflicultir with :prior hinge lasts of the locking type was that, in order'to move the hinge members .to unlocking posiv p UNITED [STA ES-r PAT- ur, 'grs cng WALTER KRENTLEB, or tum ri, MICHIGAN, ,Assie oe fro R -T En-AR L T HINGE Leer GQMPA-NY, or rnom'mmnieeu, A COERRATIQN,OEMICHIGAN- this application filed tion, the last parts were necessarily brokenw slightly. This resulted in a series disade vantage, in that, when the last wasibroken,

11 mm slightly, it would catch. ,thellining,

andv pinch thelining, and would notgiye '{a true form to the shoe. Therefor in order .to produce a satisfactory hinge last'of this I type, alt. is necessary .to provide the hinge with a locking. and unlocking member which may be moved from locked to unlocked positlon' without disturbing the relative 'positions of thelast parts,-rnaintaining awtrue and smooth surface along the bottom of the last. This I have accomplishedby my pres-w ent fnovel hinge illustrated and described Furthermore, I so construct ing member to unlocking position, thespring tension exerted on the hinge member secured to the heel pant WlllbQ increased from the:

tension exerted when the locking member is in: locked position. This I further insures holding of the Furthermore, by c the I use of novel part .of the last,iw' hieh has hereto fo're been movin :hinge -members. t" This results in a last parts in their relative .hinge, I am enabled to substantially elimi-J. hate the recessingof-the fore part-and heel I B5 considered requisite, .to accommodate the last 0 greatly increased strength and solidity, lengthening the life of the "last, and

lesseni-ng'the danger of breakage-0t the last pantsrwherel'so recessed This a lsoi's anini- I :portantadwantage in lasts utilizing my novel; -:hi;nge. or I ,I believezthatmypresent.hinge, coinprising the elements and parts above described, I namely, a plate, and 'aspring,"toget'h'er with a lockingandnnlocking member, which zlodking and unlocking member also 'actsas the spring bearing and holding member, and mwhioh'locking and unlocking membermay be movedffrom locked-to un lockedaposi'tio'n I also believe that a l astyeonstructe'd @and Without disturbing the relation OIE tl IB other hinge members, is novel,- andI- have there :foreclaimed the same herein broadly.

7 provided Withnmy novel -hinge, aind-with' the i'further advantages peculiar to lastconstru'ction, 'and made possible by the use ofimy present hinge, is novel, and I have likewise Fig. 8;

'to hold the same in locked position.

claimed such a last broadly herein.

While the preferred embodiment of my novel hinge has been herein illustrated as applied to a last,'it will be be appreciated that I amnot limited thereto, but may utilize my novel hinge on any articlesor in any line where such a hinge would be practicable. I have shown, in the present case, one modification of the application of myinovel hinge,

and many such applications will 'do'ubtles occur to those skilled in the-arts.

Further features of the invention, novel combinations of parts, advantages, and "details will be hereinaftermore fully pointed" out and claimed. f i r Referring tothe drawings illustrating'pre- ,ferred embodimentsof my present invention,

Fig. 1 is a side view of a last, in locked position,-partly in cross novel hinge;

Fi .2,is a cross ing t is looking and unlocking member in unlocked position 1 Fig. 3 is a crosssectional detail illustrating the lastin collapsed position;

' Fig. 1 is. a cross sectional view on the line 4.-4: of Fig. 1;

Fig. 5'is across sectional view on the line of'the hinge parts utilized in this modification.- As shown 1nv the.v drawlngs, my novel hinge comprises essentially a spring 1 and plate or toggle 2. A fixed pivot pin "3 is pro vided' for the plate 2. One end of the plate 2 is notched, as shown at the nose or lip 5. A member 6 is interposed between the plate 2 and spring 1, having arecess or slot 7 through whichthe lip lockornose 5spro-f jects when 'thehinge is in'locking position.

Thespring 1 bears against the front face- 8 of this locking and unlocking member 6, exerting tension and pressure onthe plate 2-, The nose 5 abutting against the lower edge 9 of the slot 7 prevents the hinge being opened,

until themember 6- hasbeen moved to un-' locking positon. On being moved to unlocking position, which consists in pushing the member 6 forwardly, the. combined pushing forward andaction of the spring 1 on the face 8 will disengage the nose 5 from the-recess 7, and slightly raise the member 6 forcing the rear face 10 of the locking member against 1 the nose 5Q The member :6 being freely displaceable relatively with the plate section, utilizing my sectional detail illustrat- Y 2 does not disturb the relative positions of the hinge parts, leaving said hinge parts in locked position ready to be opened, on pressure beingexerted on the hinge members.' The movement of the face8 of themember 6 forwardly, shortens or compresses the spring 1, thus .increasing the tension of the spring 1 on the plate 2, and insures the plate 2 remaining in. locked position, although" unlockediuntil opening pressure is applied thereto.

The hinge above described is particularly adapted to hinge lasts, of the type illustrated and described in'the said prior patents. In

the present drawings the last comprising aa heel part 1l-and fore part 12 is provided.

This last islbored orrecessed as shown at 13 in the heel and l l'in the fore part. A tube15 isinserted in the recess 14; and held *in'place by a rivet or pin 16 passing through the wood of the fore part andthe tube. The

plate or toggle 2 is. held in position in the re cess 13 by a pin17, passing .through the wood of-the last and the plate; The tube 15 is slotted at its rearmostend, as shownat'18,

3 to permit the insertion of I the front end of the plate 2, and the tube 15 and plate 2 are pivoted. on the commonpivot pin 3. The spring 1 is inserted in the tube 15, one endof 1 the spring bearing against=the pin 16, and

the other endofthe spring. bearing against the face 8 of the looking member 6, which" .locking member or-trigger6 is shown in Fig. 1 in locked position, with the nose or lip 5 entering the slot 7 and resting upon the lower edge 9 of said slot. The fore port 12 v and heel part 11 are divided by a line of cut 'to' give to the abutting faces a knuckle joint construction, wherein the'forepart 12 ,is formed 'with'a concave face 19'and the heel partwith a corresponding projecting knuckle or convex surface 20.. This line of out also terminates at thebottomof the last in theabutting faces-21' on the forepart and 22 on the heel part, and provides a firm lock or bearingagainst breaking tension dur-l.

ingthezbottoming or other operations.

With the last in extended position, as-

shown in Fig. 1, a locking contact of" great strength is required and for'this purpose the nose orprojection 5 and bottom 9 of the slot 7 produce a positive unbreakable locking thelast parts 11 and '12." This: structure,

combined with the knuckle joint feature, assures 'pos1tive locking engagement irrespective of any wear of the wood, pins, nietalyor action on the hinge members,-' and 'hence'on' looseness in these parts, affords great-rigidity and is able to withstand: torsional-or other breaking strains in the'l-as't.

these interlocking members or surfaces as to I so form render theeoll'apsing or'flexing of the last 1 impossible, without firstrelea'sing them'em ber 6 from locking ehgagement. 1 This lock ing member 6 has a neck 23, which slides in shoe.

eeeereee the slot'I8 n the tubular hthgememher 15,

and anehlargehint' er head 24 on the bet;

tron from the recess 7, and will slightly raise the-member 6', until the nose 5 abuts againstthe rear face 10 of the member 6. This unlocking movement of the member 6, is efie'eted Without movement. or distortitiii either ot the hihg'e or of the last p'erte, lea'vifig the last parts still in locked position, although unlocked. This is of great-advantatg'; ehe reee te a smooth, finished surface along the hettomo'l the last, preventing inching-er ripping of the lining et the With the member 6 in unlocked posititi'o'fi; the last parts, as clearly sh'oivn in Figs, can be readily, quickly, and easily collapsed; 6r shorteiied; shown in Fig. 3, thus" perihitting great speed in the op "era ti'on' of pulling it last from the shoe;

7. v N i 1 elnninatlng the danger of stra ning the shoe,

uppei"*during the e tie'n, and presents e distinct and tteeit-eble tee-titre in hin e lest construction. In order to permit u'll flexin efthe last parts, ehd permit thefacs of the fore pet-t and 26 or the heel part to contact; I may recess the forepart 12 slightly at 27 toeee mntedeteerhouse the locking and ui'ilo'cking'ineni'ber 6, but such recess is so small as to in no Way Weaken the W'OO'Cl of the last, A recess 28 is also formed in the heel part 11; in Whi'ch the locking member- 6 is housed, see Fig. 3, thelocking member 6 being so constructed and arranged that the lower part of the handle portion will be heused iii the re cess 27 and the upper part ofthe' ha'iidl portion housed in the recess 28.

Wheirdesired to again extend. the last, to assume the position illustrated in F ig. 1, it is only necessary to swing the heel part ,of the last around; the pivot 3, tiiitil the two parts of the last have assumed the position in Fig, 1, the spring 1 assisting in moving the heel partto locking pe sition, 'whereupon the locking and unlocking iner'nlder 6 instantly and automati cally returns to normal locking 'position. To insure positive locking of the hinge parts, the rear face of the trigger 6 is concaved adjacent the slot Thus, should either the locking portion 5 of the toggle 2, or the slot 7 of thetrigger 6 be out of line the nose 5 Will be guided by the 'concaved sides of the trigger into the slot 7. This is an important feature, and inset-es po'sitive leaking of thelr'st aiid hinge parts. "It Will thus be seen Bette produced a novel lest; inthr1301"atiii g fnjf nj-ev'ei hinge teete'tee, greatly simplifying, the structure of said hiiig'e, ind facilit ihg; o 'i'rzttion et the tes as well te sultihg in greet echhoi'hy of 'iiiahufiict'ure'. My last also is extremely siniple' to e'eeeth: ble and of great strength, as Wellas pietectin'g the hinge members and (Sena-eating} the locking petes- Thus I have peeeiieeje' so-ca' lletl n a novel and desirable last of the these illustrate a modification of n bvli' hingetand the e ph'eetieh .tliereof' to iii-*- ti'cles other than lasts, but the etreetth and principles of operatwn, of the 6 forms; are so closely correlated that I have included this modification iii the fire'seht epplicetiem -As shown in these Fig-e. 7 to 11, this fern-1 of my novel hinfge is applied to two relatively movable parts 36 ihd 31, which may 're'lqre'sen't ii" door, for eiiahipl', or the like: In the present lnodificatioii, e0- iny hinge coiiip'rises two parts or iei'evee' and 33, each one fiized to its relatively inovable part "by screws orthe like 34.. The hinge leaf ornleinbe'i' has plurality of arms, the outer arms 35 termiiiating in eyes 36; The iii'ii'ei jttir of ttriiis 37 meet at'38 to forih a. slot 39;!j'aiidtrhiii1at at their under side iii shoulders or joi'ojeetlbns 4-0, forniinlg b 'etwe'n these shoulders a'slot or opening 41: I t i The hinge leaf eimember 33 hee e phi 'ef arms 42, 42, looped to forth 'eyes',t3, 43. Vhen assembled, the eyes 43 iiiitl 36 are elineiheht, and a; p'intle 44 eeeee ther'ethrough, forming an articulated jh'int; The I leaf 33 also'has a 'ce'ntral arm 45 fehfieeet its outer end 46 with a slight hook or curve,

A lacking and unlocking lever or nimbe r 4,7 is'jiiite'rphs'etl between the tits i-ee 'ee 32" and 38, and has slot 48 into vithichthe hook or nose 4'6 er the arm eshhfh any p1 6- jects; When in locked position, as ehetth in Figs 7 and 8; the hookbr iitise 46 is the slot 48, restingon the loiver edge 49 of said s'lbt,'-ancl the shoulders or prbjecti on's 40 en age the recesses 50; 5'0 f'oiuhed the pairs of lugs 51,51 and 52, 52, the neck 53 fitting in th'ev'slot or recesses 41 betweeh the shoulder-e140, A 54 is prtivided, one end resting in recess 55 end the other end abutting they face 56 es the locking lever or meiiibe'r 47; Thtis the ieehihgiem is held in locked position by the present-e of the spring 54, firmly holding the lbcking menib'er in'eiigag'eihent as ehetth, Wheh desired to'iinlo'c'k the hih e, the hiemhefi oi lever 47 is moved to the: position shown in dotted lines in Fig. 7, whereupon the recess 48 is freed from the nose 46 and due par-' tially to the forward movement of the lever izti '54 still exerting tension thereagainst, and

maintaining the hinge members as Well as the parts to which they are secured in locked position, although ready for unlocking.v The movement of the lever 47 from locked to unlocked position does not disturb the relative positions of the hinge members or hinge parts.

' in the present case.

h After articulation or opening of the hinge, and upon return of the hinge members to the position shown in Fig. 7, the looking" I tion.

lever 47 Will automatically return to locked position, preventing articulation of the hinge until movement of the locking member 47 to unlockingposition.

I believe that such a novel articulated hinge, capable of being locked in rigid position, and capable of having the locking means moved to unlocking position without disturbing the relative position of the hinged parts, is novel, and Ihavetherefore claimedthe sameherein broadly- The close relation. of the two forms of hinges illustrated in the present case will be apparent from a glance at the drawings. For example, the leaf32 corresponds to the tube 15, the leaf 33 corresponding to the toggle 2. The trigger is substantiallythe same in'each instance. The pintle 44 corresponds to the pivot pin 3, and the spring 54: performs the same function as the spring 1. Thus I have utilized the sameprinciples of construction and. operation in each of the forms of hinge illustrated herein, and although each is applicableto a different purpose, the similarity of principle and opera tion Warrants the inclusion or both forms WVhile I have necessarily described my invention somewhat in detail, it will be appreciated that I am not limited thereto, but may vary the size, shape and arrangement of parts Within reasonably wide limits without departing from the spirit of the invention so long as I adhere to the general theory and principle of an articulated hinge, utilizing a single locking and unlocking member, de

tachably interposed between the hinge members, and serving the triple purposes of spring bearing and holding, locking, and unlocking, and capable of movement from locking tou nlockin'g positionwithout disturbing the relation of the hingeparts.

Having thus described my invention, What I claimas neW is:

1. A vtWo part last having hinged members, one member being of tubular form and ing a plate and secured to the otheruparna pivot pin uniting said members, a combined locking. and unlocking element interposed between said members, and means tovhold said element in locking or unlocking position. I I I 2. A two part" last having hinged members, one member being of tubular formand secured. to one part, the other member be ing a plate andsecured to the: other part, a pivot pin uniting said members, acombined locking and unlocking element "interposed, between said members, and a spring to hold said element in lockingnor unlocking posi- .3. In atwo part last, a hinge comprising two relatively movable members, atriggerj detachably interposed between said mem bers, a projection on one of saidIrelativelymovable -,inembers, said trigger..-pr0vided with a. slot, and means to guide said projec the relatively movdetachably: interposed between said inem-.

bers, a projection on one of'said relatively movable members, said trigger provided with a slot, the sides of the trigger adjacent the slot being conoaved tofgui'de said projection into saidslot to lock the relatively niovable members, H I I 5. In a two part last, a hingecomprising with a slot, the sides of the trigger adjacent the slot being concaved to guidesaid-projec-f tion into said slot to lock the relatively mov.-.

able members, said trigger being movable: to

unlocking position without disturbing the relation of the hinge members.

6.. In a two part last, a hinge comprising two relatively movable members,atrigger detachably interposed between said members, a projection on one of said relatively movable members, said trigger provided with a slot, the sides of the trigger. adjacent the slot being concaved to guide said projec-' tion into said slot to lock the relatively movable members, said trigger being movable to unlocking position without disturbing. the

relation of the hinge members, and a spring bearing against said trigger in both. locking.

and unlocking position.

p In testimony whereof, I have name to this specification.

WALTER A. YKRENTLER. T I

signed my 

